Page 72 - Engineering drawing from first principles using AutoCAD
P. 72
Geometrical applications 65
1
12
11
10
9
8
7
6
5
4
3
2
1
1b
9
7t-------t-------If----t--+----------3i!I~--1---I------t-l-----I
5
4
Figure 2.35
construct a copy of the remainder in the space above to give the two complete turns.
Remove unwanted lines with the BREAI( command.
Conical helix
The construction can also be applied on the surface of a cone and examples are given in
Fig. 2.35. The base of the cone has a diameter of 120mm and the height is 96mm, which
can be divided into 12 divisions of 8mm width.
